elastic/elasticsearch · error · IllegalArgumentException

Empty list of filters provided to tokenfilter [{name}]

Error message

Empty list of filters provided to tokenfilter [{name}]

What it means

Error "Empty list of filters provided to tokenfilter [{name}]" thrown in elastic/elasticsearch.

Source

Thrown at modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/ScriptedConditionTokenFilterFactory.java:51

 */
public class ScriptedConditionTokenFilterFactory extends AbstractTokenFilterFactory {

    private final AnalysisPredicateScript.Factory factory;
    private final List<String> filterNames;

    ScriptedConditionTokenFilterFactory(IndexSettings indexSettings, String name, Settings settings, ScriptService scriptService) {
        super(name);

        Settings scriptSettings = settings.getAsSettings("script");
        Script script = Script.parse(scriptSettings);
        if (script.getType() != ScriptType.INLINE) {
            throw new IllegalArgumentException("Cannot use stored scripts in tokenfilter [" + name + "]");
        }
        this.factory = scriptService.compile(script, AnalysisPredicateScript.CONTEXT);

        this.filterNames = settings.getAsList("filter");
        if (this.filterNames.isEmpty()) {
            throw new IllegalArgumentException("Empty list of filters provided to tokenfilter [" + name + "]");
        }
    }

    @Override
    public TokenStream create(TokenStream tokenStream) {
        throw new UnsupportedOperationException("getChainAwareTokenFilterFactory should be called first");
    }

    @Override
    public TokenFilterFactory getChainAwareTokenFilterFactory(
        IndexCreationContext context,
        TokenizerFactory tokenizer,
        List<CharFilterFactory> charFilters,
        List<TokenFilterFactory> previousTokenFilters,
        Function<String, TokenFilterFactory> allFilters
    ) {
        // Guard against a filter referring to itself (directly or via a cycle), which would otherwise
        // recurse until the stack overflows and takes the node down.

View on GitHub (pinned to db6a809a66)

When it happens

Trigger: Thrown at modules/analysis-common/src/main/java/org/elasticsearch/analysis/common/ScriptedConditionTokenFilterFactory.java:51 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of elastic/elasticsearch@db6a809a66 (2026-08-12). Data as JSON: /api/errors/44724514e79cc864. Report an issue: GitHub.